Arthur Fleck doesn't represent a physical threat

People complained that for Joker 2 they expected Arthur to be a more traditional joker like in the comics but apparently they didn't haved in mind that Arthur isn't even a smart criminal, he's just impulsive; that is the reason he wasn't meant to coexist with Matt Reeves Batman, he wouldn't work on a supervillain role. I think even Kick-ass could beat him up, heck, I think even we can beat him up.